Crimes do not need to be committed in anger and crimes can also be petty. Autism doesn't need to be a direct cause of a crime, but it will probably be a huge contributing factor.

I can't think of a specific case off top of my head, but I'll describe a scenario that I know I have been through hundreds of times. This could also apply to anti-social behavior or what would seem to be a disregard for "social rules" in general. (Excuse me while I try to explain a state of mind without a good example.)

Sometimes, an action seems the most logical in the moment. If someone was to exclaim in excitement, "Some one pinch me, because I must be dreaming!", my first reaction would be to take that statement literally and pinch the person. In my head, the action was justified, and I would expect a positive response when we know that likely would not be the case.

If we scale that up a hair, there have been cases, with me specifically, where an action that seems logical may absolutely not be appropriate or even legal. I absolutely have no intentions of breaking a law or causing trouble, but my brain immediately tries to solve a problem in the simplist way possible and I act on what I can only describe as reflex.

I think what I am trying to describe is very similar to my distinct lack of brain-to-mouth filter. If there is an obvious solution to something, but nobody actually says it out loud, I probably will. Unbeknownst to me, everyone already was thinking what I said, and it wasn't socially acceptable to actually say it.

Thankfully, the legal system is setup to determine actual intent. Intending to commit a crime can be much more serious than commiting a crime by accident. Even the most serious of crimes are structured this way, ie: manslaughter vs murder; intentional or accidental.